Milling machine



June 23, 1.925. "1,543,242

- F. C. ALLEN MKJLING MACHINE Filed Jan. 14, 1922 2 Sheets-Sheet 1 Jime 23, 1925. v 1,543,242

F: c. ALLEN llI"-LING MACHINE Filed Jan. 14, 1922 2 shaets sheet 1 Patented June 23, 1925.

UNITED? STAT- s BEST AVNLABLE CQRY PATENT? OFF Q E FREDERICK C. ALLEN, OF HARTFORD, CONNECTICUT, ASSIGNOR.TO- PRATT 80 'WHIT NEY COMPANY, OF NEW YORK, N. Y., 'ACORPOR-ATION OF NEW JERSEY.

r mrLLING MACHINE.

Application filed January 14, i822. Serial no. 529,333.

To all 107mm it may 50mm.-

Be it known that I, FnnnEnIc-K C. A N,

a citizen of the'United States, residing" at Hartford, in the countyfof -Hartford and State of Connecticut, have. invented certain new and useful Improvements in Mill ing Machines, of which the following is a specification.

. This invention relates tomilling machines and particularly to an mproved spindle" supporting overarm construction therefor. Milling machines' of tlife 'c'oluinn and knee column. In vertical spindlefmilling inachines, the over-arm 1s adapted to mount and entirely support the spindle above the knee, while in, l iorizontal spindle milling ly in the column and the overarm is provided with anout-bearing hanger at its outer end for supporting the outer free end of a horizontal cutter arbor mounted in the spindle.

which is adaptable either to a vertical spindle milling machine, a horizontal spindle milling machine or to a milling machine combining both horizontal and vertical spindles.

It is an object of the invention to proon the column and a plurality of bracing ole .ients therefor extending from the'coli umn to the outer end of the overar-m, the construction being such as to support the cutter spindle more rigidly than has been it a horizontal cutter arbor and the other overarm being furthermore prorided with a vertical spindle therein and means for driving the same from the said horizontal spindle, means for securing either 20f thi's' specification,

vention, thej l spind ride in combination with a. milling machine column, an overar-m construction comprismg a main overarm adapted to be mounted overarm to the column and a plurality of bracing elements extending from the {column" to the outer'endof the overarml With theabove and other'obje cts in View, my invention oonsistsin'the features of construction'and operi fiqn set forthin the followingf specification" and illustrated in the p ,drawihg "In such drawmg sannealed; heret 'ining part I have shown certain embodiments of my inye'ntion in a milling machine but 'it willi be "rto'od' that i. the inve'ntion j can beotherwi'se 'mbodiejd and that the drawings 1 are n t ;to bef construed as defining o'r' limiting t s scope of the ina saprefi edto h p ficatio'n beingreli'ed upon'for that purpose.

Referring "to" the 'ffig ires of the drawings I Figure I i'sflaf si'de elevationf'ofthe. up-

per; portion of amillingfmaehinej column machines the spindle is mounted horizontalprovided with one form of. my {improved le' supporting overarin construction'; Fig. 2 is a'plan View thereof; I Fig. 3 is a ,front' end elevation 'ot' the overarm and the ,out bearin'g hanger there- Theprimary object of the, present invention is to provide an improved ovcrarm constructhm oi" the type stated "of thecolu'mn and knee type, the cutter arbor is supported 'betweenthe spindle in the column. and an out-bearing hanger-{ at the end of an overarmon 'the column. My invention comprises an improved overarm construction for this purpose wherein, in addition to the usual overarm, there is provided two spaced bracing bars extending outwardly from the column at opposite sides of the spindle and having their outer ends secured to the downwardly extending outer end of the overarm, the arrangement being such as to form'a rigid truss-shaped spindle supporting overarm construction over the work support. This same arrangement mayin like manner be applied to a vertical spindle milling machine or to a combined vertical and horizontal spindle arm longitudinally on the column. is will milling machine as illustrated in Figs. 5 be noted, the overarm may be clamped in to 8. A avill'ibe" noted, theibracin'g bars fanyf ofits adjusted positions eibygtightening referred to are "secured 'to the column in a the "nuts14? dnboltsl i.

spaced position at opposite sides of the The forward end of overarm 7 is curved spindle: i'nxa mannento provide-sufficient downwardlyfiand is provided witha spindle roolntheirebetweenl for theloperationaofzthe supporting.- out-hearing l1'a11'gen'2l-- mounted vertical spindle, as illustrated in Fig. 8. in a horizontal guideway 22 therein. The it will be understood that the co1umn-antl out-bearing hanger may be secured in posibracing bars shown in all figures of jche tion by means of clamping bolts 23. Comdrawings are the same, such construction a .b n gadar e rt u ese reendi inpmibth ef r mo sn ifi al ytwm dr win -s'by r fe enc zclierac ersi l inma s the 5 column of .a millingmachine provided with a rim talsr ad e 2 t erei The-spi dl i dr en from a ge n h s Wi a' sea aim the' .spindle. The top otthe column is provided with, spaced front and' 'rle'ar guide- Ways 5 and are e mn. b ng lo n j.

., open .thronghthe' top thereof betweenlsuc I A] 11$ at nFig$4 ahq l giuideways as {illustrated particularly in Figs. 1,2, 6 and]. 'Flhe'columnisadapted ,to' have mounted thereon either a'horiz o'ntal spind sup i ing vner fih yp -i u trated inf igs- 1' "to 4: or ;a..vertical gr ver- -ical, and horizontal spindle ovjerar n cf the typefillustrated in'F;ig-s.l 5.to'8. wlarm 1 runw y 8 n wane wee-a? wi the front and rear, ,guideways 5 and f6 on the column. bottom walls 8 and 9 respectively c'onnect 'ing the outer portions of the trout and roan guideways. Such guideways are slotted transversely. atlO and 11 .whereby to provide 'front and rear flexible guidew-ay 5 portions .12 and 13. lhrough ;bolts 14 are provided for drawing the fie'xible portions 12 and 13 into tight clamping engagement with ,the column guideways '5 and .6.

As illustrated in the-drawings, the-arm is adjusted to its rearmost:positionen the column. The same may be adjusted forwardly the distance .o'ftherear overhang ing" portion thereof shown in Fig. 1. means for so adjusting the arm is illustrated as comprising a screw 15 lrigidlysecuredto the column and extending longitudinally of the ov erarm. A spiral gear 16, mounted on a bracket 17, threadedly engages the screw. A shaft 18 also mounted in the said bracket transversely of the screw is provided with aspiral gear 19 thereon in mesh with gear 16. The bracket 17 and its several elements may be assembled in the overarm through a large opening 20 therein, the bracket being provided integrally with a plate 18' adapted to be secured to the over- ,arm screws 19' to support the bracket The]. mam I provided lavith I eltylofwthe'inventiong The downwardly .ex-

.t ei1 lii1g ,poi't oh ,olf 'the ov'crarm is provide-l ,on each side thereof with an opening for receivingpm endofeach of the said bars, the other ends of the bars being mounted in the-column. The. overarmportion forming each opening 25-i's@ split at 25mm provided with planipiing screws f26flfor drawing the said PQ f Qn into gh damp ng eng ment with the bars 'Ihrough openings 27 are preferably provided in the column for a. [receiving the 113 ;324- The column is slotted v -t'28 t prorid resi ientcl p ng portions 27 These portions may be drawn into tight engagement with the bars by means 01" v ffih i l gh Q f-is Pro i d w u s 29 on f7. provided with spaced ;Eront.,.and

nu s'llt; 13 IWi therefore be s ha the ,main'overarm '7 and' bar's 2(1 may be rigidly secured together-into, a single overarm construction and longitudinally adjusted bodily in the column orthe bars 24 may be rigidly secured to the column and the overarm 7 adjusted longitudinally on-the column and along the bars.

The'joverarm f? is assembled on the column in -the.-foll w in g manner. lhc arm is suspended over the column with the rear ends of guideways 8 and 9 on the overarm directly in 'front of and in alignment with the front ends of guideways 5 and 6 on the column, The arm may then be moved rearwardly to engage the arm and column A guideways, the nut 16 being threaded on to thescrew 1'5 rotating the shaft '19.

In Figs. 5 to 8, the column 1 and spindle 2 are the same as those shown in Figs. 1 to .4. The overarm 30'mounted on the column comprises a construction combining both a vertical spindle and a horizontal spindle overarm support. Thisovera-rm is provided with spaced front and rear guideways 31 and 32, the same as guideways 8 and 9 on the overarm 7, and such guideways engage the column guideways 5 and 6 and may be secured thereto in the same manner. The overarm is also provided its rear end with a like adjusting shaft 18 carrying a gear 19 in mesh with a gear 16*.mounted on a aracket 17 cooperating with the screw 15 on the column.

This construction is the BEST AVAlLABLE coP engaged by a gear 37 journaled in the overarm. The gear 37 may be rotated to adjust the head vertically by means of a cooperating gear 38 provided with an operating shaft 39. The driving means for the spindle comprises the following mechanism. A gear 40 to which the spindle is splined for vertical movei'i'ient is in mesh with a gear ll on a vertical shaft 42. A bevel gear 43 on the shaft 42 is in mesh with two bevel gears at and 45 loose 'on a horizontal shaft t6. A clutch 47 splined' to shaft &6 between gears 44 2111(l45 may be thrown in either direction by means of a handle 48' to operatively engage the shaft with either of such gears. "The mechanism just described is mounted on thGOVEI'ELIITl. The driving mechanism for the shaft 46 now to be described is mounted-on the column.

' This mechanism comprises a spur gear 49 keyed to asleeve 50 rotatable within bearings 51. These bearings are mounted on the column and are secured thereto by means of screws 52. A gear 53 also sup ported on the column in the same manner is in mesh with gear 49. In the driving position illustrated the gear is in mesh with the aforementioned gear 4 on the spindle and the shaft 46 is spliued for sliding movement within the sleeve 50. It is obvious that the vertical spindle 35 may be driven in either direct-ion from the horizontal. spindle through the mechanism just 7 described.

In addition to the vertical spindle illustrated it should furthermore be noted that the overarm 30 is also provided with an out-bearing hanger 54: for supporting the outer end of a cutter arbor mounted in the horizontal spindle 2. The bracing bars 2-1: shown in Figs. 5 to 8 are secured to the column and in the overarm in the same manner as has been described in reference to the construction shown in Figs. 1 to 4. It will be noted that such bars are sufficiently spaced from opposite sides of the spindles to permit free operation of the vertical spindle 35 therebetwcen. The vertical spindle is adapted tobe lubricated from an oil not 55 formed in t-he top of the head 84: and the spindle operating gearing is adapted to be lubricated from an oil pot 56 formed in the top of the overarm 30.

The overarm 30 is assembled on the column in the following manner. 15 is first removed from the column. The gears 49 and 53 are then mounted on and The screw secured to the column in the position illustrated in Fig. 6. The overarm, with its bracket 17* and mechanism supported thereon removed, is suspended over the column with the rear ends of guideways 31 and 32 on the arm directly in front of and in alignment with the frontends of guide- -ways 5 and 6 on the column, as has been described in reference to the structure shown in Fig. 1. The arm is then moved rearwardly, the splined shaft 46 sliding within it's driving sleeve 50 and the arm and col umn guideways inter-engagin \Vith'the overarm in position on the column, the bracket 17 with its mechanism is secured to the overarnrand the screw 15 is threaded into the nut 16 and'then secured rigidly to the column by screws 15. The overarm may thereafter be adjusted on the column and be securedmadprsted position in the samemanner as has been described in reference to Figs. 1 to 4.

That I claim is:

1. In a milling machine,the combination of a columnand a cutter supporting overarm construction comprising a main overarm mounted on the column and a plurality of bracing elements therefor, the said elements being secured to the column, extending outwardly therefrom beneath the overarm and secured to the outer end of the overarm. I i i 2. In a milling machine, thecombination of a column, a horizontal spindle therein, and a cutter supporting overarm construction comprising a main overarm mounted on the column and two bracing bars there-- for, the bars being secured to the column adjacent opposite sides thereof, extending outwardly therefrom parallel to the spindleand beneath the overarm and secured to the outer end of the overarm.

In a milling machine, the combination of a column and a cutter supporting ox erarm construction comprising a main overarm mounted on the column and two bracing bars therefor, the bars being mounted in the column adjacent opposite: sides thereof, extending outwardly therefrom beneath the overarm and secured to the outer end of the overarm, and the said overarm construction being longitudinally and bod ily adjustable in the column.

4. In a milling machine, the combinatimi of a column and a cutter supporting over arm construction comprising a main overarm mounted on the column and two bracing bars therefor, the bars being mounted in the column adjacent opposite sides thereof, extending outwardly therefrom beneath the overarm and secured to the outer end of the overarm, the said main overarm being adjustable on the column and along the bars.

5. In a milling machine, the combination BEST AVAlLABLE C ofra colum-m-an goverarm-lmounted on the column and: adapted to exte'nd cutrwardly and-downwardlylover a Work supportpbracingmeans having the ends thereof secured to the column (and to 'thedownwardly extendingxportionfoff rthe-overarm, the said means extending longitudinally of and heneath the overarm and forming-therewith awtruss-shaped overarm construction over the niorlrsupport. V v 1 T 6. dmaeniilling machine, the=combination of a-column, ran overarm mounted on the column and adapted to'extend outwardly and downwardly over :a work support, and

Hill) -a pair of bracinghars having the ends thereofsecured to the column andito -the down- \vardly eXtending" portion of the overarm, the said bars extending beneath-opposite edges of the overarm and forming, there- With a *truss-shaped overarmconstruction "over the'worksuppor t. l

7. In a milling machine, the of a column, an overa nn' longitudinally adju'stable onthcucolumna'ndadaptedi to ex tend outwardly :and downwardly over; awork 1 support, means 'for securing the arm r1g1d-.

ly to-the column, and-a pair of bracing bars having the ends thereof secured ato the column and to -'the downwardly extendingportion of the overarm, the said bars extending beneath vopposite edges of. the :overarm and forming therewith a truss-shaped overarm constructionover' the WOIk support.

8. In a milling-machine, the-combination of a column. acutter spindle, an overarm 'rnountedon thecolumn and adapted to -ex tend outwardly and downwardlyover a Work support, and a pair of bracing bars at opposite sides of'the spindle having the ends thereof secured to the column and to the downwardly extending portion of the overarm, the said bars extending beneath opposite edges of the 0-\-'er.ar1nand forming therewith a truss-shaped overarm construction over the work support.

9. In a mllllng machine, the combination of a column provided with guideways thereon, a cutter spindle, anoverarm mounted on the column and adapted to extend over a work support, the;overarmbeing pro- "vided With-dongitudinal guideways engaging the column guideways, means for positivel y adj ustin' he overarm on the, guide ways, t-Wo bracin bars respectively on opposite sides of "thes s-indie beneath the overarn'i, means for securing the opposite ends or": each bar in the'column and in the outer end of the o'verarm, and means for securing the merarm to the column in the different adjusted positions thereof. I

10. In a milling machine, the combination of a :column provided with spaced front and rear guideways, a cutter spindle, an overarmmoun-ted on the column and adapted to combination 7 extend loner, pa; {Wonk support, the :orerarm being providedflvith spaced gu-ideways slidably engaging the column guideways, moans eooperati-ngewviththe guidervays tor securing-lth e overa-rm to the column, the construction ,being :such that the overarm can he removed from the column by a relatively short longitudinal adjustment of the overarm to ldisengage the; 'gu-ideways thereof from the! column ,guideways. 11. In a,mil-li-ng,-machine, the combination I of: a column, 'a; hellovv, roverarm mounted on the column and (adapted 'to extend over a vor-l: r'suppert .ai cutter, spindle vertically mounted in t'the t-overarm over the work .support, rmechanismflin the arm for driving the spindle, :tvvo bracing sbars respectively at opposite sides ;.of the spindle beneath the 'overanm, ,rneans for securing the opposite ends of eaclrtban-intthe column and in the outer end of the overarm, and .means for detachably. securingtheoverarm to the column. i 12. In ,a millingmachine, ,-,tl ie. c0mbinat-ion of a column,.-,a-- gearnotatably mounted therein, a "hollow ove rarm mounted/on the column (and adapted toextend over ,a work 1 support, a cutter-spindle vertically mounted -i-n the ovenarm ot er the work support, mechanism in the ,arnrsomprisinga gear adapted to be driventrom thecolumn gear for drivthe spindle two bracing/l ars :respectivc- 1y at oppositer'sidesqoi -the spindle beneath .the overar-m, means tor-securing the opposite ends of each bar in the column 11nd in the outer end oflthe ;overarm, and means foradj'ustabfly anddetachablysecuring the overarm to the-column.

13. In a milling machine, the combination of a column, a horizontal cutter spindle therein, ,a .gcar on the spindle, a hollow" overarm mounted on the column and adapted to 'extend over a Work support, a cutter spindle vertically.mo-unted in the overarm over ,the, worksupport, mechanism in the arm-comprisinga gearadapted to be. driven from the spindle :gear for driving the vertical spindle, two bracing bars respectively at opposite sides of the vertical spindle heneath the overarm, means for securing the opposite endsofreach bar in the colunurand in -the outer end of the overar-m, means for adjusting the overarmlongitudinally thcre of on the column, and means for rigidly securing the arm to the column.

14. In a milling machine, the combination of a column provided withspaced front and rear guideways, a cutter spindle, an overarm mountedon the column and adapt- .ed to extend over a Work support, the overarm being provided with spaced guideways slidably engaging the column guideways,

two bracing bars respectively at opposite. sides of the spindle beneath the overarm, means for securing the opposite ends of each bar in the column and in the outer end of the overarm, and means cooperating with the guideways for securing the overarm to the column, the construction being such that the overarm can be removed from the column by a relatively short longitudinal adjustment of the overarm to disengage the guideways thereof from the column guideways.

15. In a milling machine, the combination of a column provided with spaced front and rear gui deways, a gear rotatably mounted in the column, a hollow overarm mounted on the column and adapted to extend over a work support, the overarm being provided with spaced guideways slidebly engaging the column guideways, a cutter spindle vertically mounted in the overarm over the therein, a gear on the spindle, gearing re movably mounted on the column and operatively connected to the spindle gear, a hollow overarm mounted on the column and adapted to extend over a work support, a

cutter spindle Vertically mounted in the overarm over the work support, mechanism in the arm comprising gearing adapted to be driven from the last mentioned gearing,

means between the horizontal and vertical spindles for reversing the direction of rotation of the vertical spindle, and means for removably securing the overarm to the column.

17. In a milling machine, the combination of a column, a hollow overarm mounted thereon and adapted to extend over a work support, a spindle supporting head mounted for vertical adjustment in the forward end of the arm over the work support, a cutter spindle mounted vertically in the head, a threaded rod secured vertically to the head forwardly of the cutter spindle, a nut rotatably secured to the arm and threadedly engaging the rod, means adjacent the front of the arm for rotating the nut to adjust the head vertically, and means for rotating the cutter spindle.

18. In a milling machine, the combination of a column, a horizontal cutter spindle therein, a hollow overarm mounted on the column and adapted to extend over a work support, a spindle supporting head mounted for vertical adjustment in the forward end of the arm over the work support, a cut ter spindle mounted vertically in the head, means on the arm forwardy of the vertical spindle for adjusting the head vertically,

means for rotating the vertical spindle from the horizontal spindle including'means in the arm for reversing the direction of rotation of the vertical spindle, and means for removably securing the overarm to the column.

In testimony whereof, I hereto affix my signature.

FREDERICK C. ALLEN. 

